Campus Units

Materials Science and Engineering

Document Type

Article

Publication Version

Submitted Manuscript

Publication Date

2015

Journal or Book Title

Journal of Forensic Sciences

Volume

60

First Page

1436

Last Page

1440

DOI

10.1111/1556-4029.12863

Abstract

Historical and recent challenges to the practice of comparative forensic examination have created a driving force for the formation of objective methods for toolmark identification. In this study, fifty sequentially manufactured chisels were used to create impression toolmarks in lead (500 toolmarks total). An algorithm previously used to statistically separate known matching and nonmatching striated screwdriver marks and quasi-striated plier marks was used to evaluate the chisel marks. Impression toolmarks, a more complex form of toolmark, pose a more difficult test for the algorithm that was originally designed for striated toolmarks. Results show in this instance that the algorithm can separate matching and nonmatching impression marks, providing further validation of the assumption that toolmarks are identifiably unique.

Comments

This is a manuscript of an article published as Spotts, Ryan, and L. Scott Chumbley. "Objective analysis of impressed chisel toolmarks." Journal of forensic sciences 60, no. 6 (2015): 1436-1440, doi:10.1111/1556-4029.12863. Posted with permission.

Copyright Owner

American Academy of Forensic Sciences

Language

en

File Format

application/pdf

Published Version

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